Wheel dresser



July 7, 1931- E. A. SHRIVER WHEEL DRESSER Filed Jan.

1924 2 Sheets-Sheet l July 7, 1931. SHRWER 1,813,682

WHEEL DRES SER Flled Jan. 3, 1924 2 Sheets-Sheet 2 Patented July 7, 1531 EDWARD AUGUSTUS srrnrvnmor CINCINNATI, OHIO, ASSIGNOR, BY MESNE assroN PATENT OFFICE" MENTS, TO CINCINNATI GRINDECRS INCORPORATED, F CINCINNATI, OHIO, .A

POBATION OF OHIO Application filed January 3, 1924. Serial No. 684,126.

This invention relates to means for dressing the grinding wheels of' grinding machines, and is'of particularutility when embodied in the construction of grinding ma 6 chines of the type in which the articles to'be treated are supported on centres carried by an adjustable head-stock and an adjustable tail-stock, respectively, and are presented rotatively for the grinding action of a wheel 16 between which and the workpiece there is a relative movement along their axes of rotation.

An important objective of the invention is to provide a wheel-dresser which is organw ized as a permanent instrumentality of the grinding apparatus, and can be quickly and easily set in position fordressing the grinding wheel, and can be asreadily stowed out 1 of the way, without the laborious detail of bodily detaching and removing 'the device entirely from the grindingmachine; an operation which'must-be performed with conventionaldressers, the construction ofjwhich does not permit stowing away the dressing device and its support in situ.

Other objects and advantages will be in part indicated in the following description and in part rendered apparent therefrom in connection with the annexed drawings.

To enableothers skilled in the art so fully to apprehend the underlying features hereof that they may embody the same in the various ways contemplated by this invenconstruction have been annexed as a part of this disclosure and, in such drawings, like characters of reference denote correspond-. ing parts throughout all the views, of which In the drawings, Fig. 1 is a perspective of a grinding apparatus shown with a wheeldresser embodying the invention; only so much of the apparatus being shown. as is esfi sential to illustrate the improvements. Fig. supporting bed, with the wheel-dresser shown'in elevation, and a fragment of the "wheel being dressed. Fig. 3 is a rear elevation of the wheel-dresser, isolated, with a tion, drawings depicting a preferred typical 2 is a transverse vertical section of the work-.

fragment of the bed. Fig. 4 i s a persneetive-tifi.n

WHEEL :on-nssnn of the apparatus shown in Fig. 1, but with the wheel-dresser stowed in situ, clearing the working space for a workpiece, which is shown in place. Fig. 5 is a vertical sectional view, of a diagrammatic character, similar to Fig. 2, but on a larger scale, showing'contiguous parts of the grinding wheel and workpiece, and illustrating by dotted lines the comparative position of the wheel-dresser when substituted for the workpiece.

In the illustrated embodiment of the in vention, parts of a conventional grinding apparatus are shown, including a grinding wheel 1, and a work-supporting bed 2, with a head-stock 3 and a tail-stock 4 having respectively the usual centers 5 and 6 to hold a workpiece in position for treatment by the wheel 1, such a workpiece being shown at- 7 in Figs. 4 and 5, while the reference charac ter '8 designatesthe usual slideways, and 9 designates the attachment groove usually found in the face of such bed, for adjustable attachment of the stocks 3 and 4.

In accordance with the invention, a wheeldresser is provided, as an organized instrumentality of the grindingapparatus, occupying a permanent position adjacent to the gnnding wheel 1, and of such construction that it can be set up for action, as shown in Figs. 1, 2, and 3, where it occupies the position ordinarily devoted to the workpiece, or it can be stowed in situ, out of action, when not required for dressing operations.

This stowability of the wheel-'dresser, in assembled relation with the grinding apparatus, differentiates 'the present improve ments from conventional structure, and any suitable means may be adopted to eifect the purpose. As one convenient structure, the

wheel-dresser is shown ascomprising an at tachment-member or base 11, and a toolholder 12, hinged ,to the base. by pintles or pivots 13 thetool-mount 10, tool 14 and setscrew 15 being shown as 'of conventional structure, which can however be varied as required.

The basell pre as theinverted. isfi fili ferably has adjusted position, as a unitary structure, and its basic position need rarely be changed.

Its stability in adjusted position may be promoted by the provision of feathers 17 taking into the ways 8, as shown in Fig. 2, and preventing the wheel-dresser from slewing around on the bolt 16. When inoperative, the tool-holder 12, with the tool 14 still in place if desired, will rest upon the bed in the position shown in Fig. 4.

In operation, the tool-holder 12 is swung upward from its position of Fig. 4, through the dotted line position of Fig. 3, to the operative position shown in full lines In Figs. 1. 2 and 3, and indicated in dotted lines in Fig. 5. In order to maintain the tool-holder firmly in this operative position, with the tool 14: presented in dressing relation with the grinding wheel 1, an abutment 18 is preferably provided, integral with the base 11, and at a suitable height above the base 11 this abutment is engaged by a lug 19 on the toolholder, and a link 20, with thumb-nut 21, may be provided, to swing around an axis 22, and enter the notch 23 of a fork at the upper end of abutment 18, the nut, 21 being then tightened to draw the lug 19 against the abutment shoulder 23, as shown in Fig. 3.

The grinding wheel 1 is then rotated and dressed as usual, by the tool 14, and Fig. 5 illustrates the accuracy with which the tool may be brought into position to dress the wheel 1 at its working region, this position corresponding closely with that to be occu pied in due time by a workpiece 7 which is shown in full lines in Fig. 5. The wheeldresser is shown in dotted lines, by way of comparison.

When the dressing is finished, the toolholder 12 is released by unscrewing the wingnut 21, swinging the link 20 up, and swinging the tool-holder 12 down, preferably with the tool 14 in place, so that they lie flat in situ on the bed 2, not interfering in the least with the emplacement and grinding of as many pieces of work 7 as can be treated before it becomes necessary to dress the grinding wheel 1 again when the above operation may be repeated.

Accordingly, the wheel-dresser thus organized as part of a grinder and taking the form of an adjustable an stowable permanent attachment, constitutes a notable source of economy in time and labor, and renders the dressing of a grindin wheel such a simple operation that the woi kman is induced thereby to keep the grinding wheel in better dress than when, in each conventional dressing operation, he had to install the complete tool-stock and tool, and then remove the same.

Without further analysis, the foregoing will so fully reveal the. st of this invention that others can, by ap ying current knowledge, readily adapt it or various utilizations by retaining oneor more of the features that,

\/4. Grinding apparatus,

from the standpoint of the. prior art, fairly constitute essential characteristics of either the generic or s ecific aspects of this invention and, there or, such adaptations should be, and are intended to be, comprehended within the meaning and range of equivalency of the following claims:

Having thus revealed this invention, I claim as new and desire to secure the following combinations and elements, or equivalents thereof, by Letters Patent of the United States 1. Grinding apparatus, comprising a worksupporting bed, a grinding wheel, a wheeldre'sser organized therewith and comprising a base-member adjustably secured upon said bed, a tool-holder hinged to said base member below a horizontal plane intersecting the axis of the grinding wheel and adapted to be swung upwardly into vertical alignment with the axis of the hinge into wheel-dressin position, an abutment provided by said asemember and adapted to limit the movement of said tool holder into wheel-dressing position, and a positive locking-device comprising a locking element carried by said tool holder and adapted to engage said abutment positively to maintain said tool-holder in its. x

wheel-dressing position.

work-support, a grinding wheel, a wheeldresser organized therewith, and comprising a base member secured upon said worksupport, a tool-holder pivoted to said base member beneath the work and transverse to the axis thereof, an abutment provided by said base member and provided with a forked end, and a locking element carried by said t0ol-holder and adapted to releasably engage said-forked end to maintain the toolholder in its operative position.

3. Grinding apparatus, comprising a work-supporting bed; work-supporting head and tail stocks fixed to said bed; a grinding Wheel, and a wheel-dresser organized therewith and movable in situ to occupy its wheeldressing position, and alternatively to cocupy a position of rest beneath the workpiece and flat upon said bed; said wheel.- dresser having a base member fixed to said bed between said head and tail stocks and a tool-holding member pivoted to said base member adjacent said bed on an axis arranged transverse to the axis of the grinding wheel; and means positively to maintain said tool holding member in wheel dressing position with the dressin -tool in vertical alignment with the pivot between the basemember and the tool-holding member.

comprising a work-support, a grinding wheel, and a wheeldresser organized therewith having a base with means for securing said base adjustably to said work-support; a tool-holder hinged to said base and movable in situ to occupy a vertical wheel-dressin position, and alternativelyto occupy a orizontal position of rest, closely-adjacent to said Work-support, beneath the work-piece; a vertically disposed abutment provided by said base and adapted to limit the upward movement of said toolholder to a vertical position; and positive locking means to maintain said tool-holder in Wheel dressing position.

In witness whereof, I hereunto subscribe my name.

EDWARD AUGUSTUS SHPJVER. 

